As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR EMER OPEN RED CAS ILLUMINATED-IN FLIGHT DESCENDING TO FL 290 DOOR PAX OPEN RED CAS MESSAGE ILLUMINATED. EMERGENCY DECLARED CHECKLIST COMPLETED LAND AS SOON AS POSSIBLE AS PER CHECKLIST. REPLACED MED DOOR SWITCH AND J0057 CONNECTOR PLUG. OPS CHECKED GOOD. REMOVED 505-25962-401 SWITCH, 330-00185-78 CONNECTOR.